Jack for nailing-machines



(No Model.) 2 Shets-Sheet 1. P. H. PRATT.

JACK FOR NAILING MACHINES. No. 432,074 Patented July 15, 18910.

t 3 N llmlmnmil 1 lllummuf/ III M i "LIN" (No Model.) 2 Shets-Sheet 2. P. H. PRATT. JACK FOR NAILING MAGHINES.

N0. 432,074. Patented July 15, 189.0.

ladfiaeaaea 1% 3% NITED STATES PATENT OFFICE.

PRESCOTT II. PRATT, OF EAST BRIDGEIVATER, MASSACHUSETTS, ASSIGNOR TO THE TIRE GRIP FASTENING COMPANY, OF CHICAGO, ILLINOIS.

JACK FOR NAILING-MA'CHINES.

SPECIFICATION forming part of Letters Patent No. 432,074, dated July 15, 1890.

Application filed May 11, 1889. Serial No. 310,386. (No model.)

To all whom it may concern:

Be it known that I, PRESCOTT H. PRATT, of East Bridgewater, county of Plymouth, State of Massachusetts, have invented an Improvem ent in Nailing-lvlachines and Jacks therefor, of which the following description, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings representing like parts.

To prevent rapid wearing of the heelin boots and shoes and to also secure the top lift to the heel in a better manner, it is customary to drive into the heel at intervals slugs or nails, which show at the outer face of the top lift. These slugs or nails are commonly driven by hand, although they havesaid jack and support having such construction that the jack carrying the shoe having the heel into which it is desired to drive or insert metallic fastenings singly may be r0 tated freely under the nose of the driver and yet always present the top lift of the heel in a plane which if projected and made to cross the plane in which the fastening approaches the top lift, would form an obtuse angle with relation to the line of movement of the fastening. This presentation of the face of the top lift in an angular position, as described, enables the fastening to be inserted through the top lift and into the heel at an inclination thereto, so that the fastening will not run out or appear at the edge of the heel.

My invention consists, essentially, in the combination, with the frame of a machine for inserting the metallic fastenings, of an inclined rest or support upon which may be rotated freely the jack supporting the shoe the heel of which is to be nailed or slugged; also, in the combination, with an inclined rest, of a jack freely movable thereover; also, in the combination, with an inclined rest and means for adjusting it, of a jack movable on the said rest.

Figure 1 in side elevation represents part of a machine for inserting metallic fastenings, with my improvements added. Fig. 2 is a section of the toe-rest and part of the jack shown in Fig. 1 in the line .90. Fig. 3 is a section of part of the jack in the line It, chiefly to show the heel-pin and means for holding it. Fig. 4 is a vertical section taken through the heel-pin, the latter being, however, as shown, screwed directly into the jack rather than as having a ball-like end, the sections at the right-hand side of Fig. 4 being respectively in the lines 00 and Fig. 5 is a top view of the inclined jack-support. Fig. 6 is a section in the line 00 Fig. 1. Fig. 7 is a vertical section of the parts shown in Fig. 6

in the line 00 and Fig. 8 is a sectional detail to be referred to.

The standard A is supposed to be that of any usual machine having at its upper portion usual devices for inserting metallic fastenings such, for instance, as described and represented in United States Patent No. 325,274- or it maybe any other usual or well-known form of devices adapted to either drive the end of a metallic strip into the heel and then cut it off to form a fastening, or to cut off a wire and form a fastening before driving it, or to drive independent metallic fastcnings one at a time.

The frame-work of the machine has a suitable socket, as A, and when the said machine is not being used to nail heels the said socket may receive in it the shank of any usual horns ay such as shown in United States Patent No. 325,274.. In this presentinvention the said socket receives the shank B, provided at its upper end with an inclined support 13, on which rests the foot cof a jack C. As herein represented,the shank B has at one side of it a series of teeth, as b, which are engaged by the teeth of a sector I), pivoted at N, and having a suitable handle or device by which the said sector maybe moved to raise or lowerthe shank, and with it the in- 5 clined support 13. The said shank also, as

herein represented, has at one side, as shown best in Figs. 6 and 7, aseries of ratchet-teeth, as If, which are engaged by a series of dogs b mounted to slide in a suitable guide, as 11 ,100 preferably forming part of a block b, secured by suitable bolts or screws 11" to the socket A.

In practice the teeth 19 will be made in the shank at different distances apart, or some of the teeth will be finer than others, so that one or more of the pawls may engage one or more of the teeth If, as is well understood, when it is desired to gain fine adjustments. The dogs referred to are normally acted upon by springs e, which press them into locking engagement with the ratchet-teethb but all the dogs may be released or drawn outwardly by the lever e, pivoted at e whenever it is desired to raise or lower the shank B by the sectordescribed to adapt it to the particular heel in which the nails or slugs are to be driven, the dogs readily engaging and retaining the said shank in the position in which it may be left by the sector.

The support B is represented as having a stop-plate or curb B under which may extend a part of the foot of the jack when the latter is drawn out away from the standard of the machinethe position that the j ack will occupy when the shoe is to be taken off from the jacksuch curb acting as a stop to prevent the jack from being lifted from the support when strain is put upon the shoe to remove it from the heel-pin, to be described. The foot of the jack herein shown stands loosely on the inclined support B and is freely movable thereon.

The jack has a heel-pin f, which may be of any usual construction; but I prefer to make the same in two pieces, as best represented in Fig. 4, wherein it will be seen that the heelpin is made in two parts, it having an inclined or wedge-like face. By dividing the heel-pin and providing it with inclined faces the said heel-pin, when the last is applied to it and pressed down, is made to move one part upon the other until the heel-pin is thoroughly wedged into the hole in the last, thereby enabling the heel-pin to adapt itself to any sized hole in the last and to hold firmly a last the hole in which has become worn in use. The part 2 of the heel-pin, as represented in Fig. 4:, (which figure is supposed to show, but 011 a larger scale, the heel-pin represented in Fig. 1,) is represented as having a dovetailed projection 3 at its beveled side, which enters a dovetailed groove in the upper part of the part 4 of the heel-pin at its beveled side, and so also the part 2 is shown as having a groove 5 at its beveled side just below the projection 3, which groove receives a' pin 6 in the part 4 of the heel-pin. The part 2 of the heel-pin has a shoulder which bears upon a washer 7, which is splined with relation to the part 4 of the heel-pin, and a spring 8, resting at its lower end upon the block 9, acts at its upper end against the said washer and normally keeps 'the part 2 of the heel-pin in the position shown in Fig. 4:,in which condition the heel-pin presents its narrowest diameter in cross-section. The block 9, supporting the heel-pin, has a shank or foot provided with a ball-like end, which is embraced and held in adjusted position in a socket g 9 the parts of the socket being clamped together by a clamp-screw preferably having a long handle, as g (see I may use any other common equivalent.

I have represented the jack as having an arm m, upon which is adjustably mounted a toe-rest m, a screw on acting to confine the toe-rest in its adjusted position longitudinally toward and from the heel-pin, such adjustment being made to accommodate for lasts of different; length. I have also provided the arm with a latch m having a pawl-like end, which co-operates with the tooth-sector m attached to or forming part of the jack, so that when the arm m is turned upon the pivot m connecting it to the jack, the said pawl in engagement with the ratchet-plate will retain the arm in the position into which it may have been lifted, thus enabling the rest to be adapted to not only shoes of different size, but also to different shapes of last.

The toe-rest is shown as grooved at each side, as at 20, to thereby afford ready place for the entrance of the thumb and fingers of the operator as he grasps the toe part of the rest and shoe in one hand and in so doing turns the same and the jack.

In the machine under consideration it will be understood that the nails or slugs referred to may be inserted in the heel while the same is upon the regular last upon which the shoe was lasted to be sewed either by hand or by a machine, such as the Goodyear & McKay or other machine for sewing welted shoes.

' I do not desire to limit my invention to the particular form of jack shown, as instead of the jack shown I may employ any other wellknown form of jack, the gist of this present invention being in the inclined support rather than in the jack and in the employment with such a support of a freely-movable jack.

In operation the last containing the heeled shoe and provided with a top lift into which the slugs are to be driven is jacked firmly upon the jack, so that the face of the top lift will stand in a horizontal plane, so that when the foot of the jack stands on the inclined plate B the face of the top lift will be inclined from a true horizontal plane, according to the inclination which it is desired that the nails or slugs to be driven into the top lift and heel shall have from or with relation to a line perfectly perpendicular to the face of the top lift. In this condition it will be understood that as the jack is rotated with its foot resting upon the inclined support the angular pre sentation of the face of the top lift to the usual mechanism for inserting the metallic fasten- IIO ings will be the same at whatever point the top lift may be presented to have a fastening inserted into it, so that the inclination of the fastenings inserted into the heel will be the same Whether the fastening is driven near the breast of the heel, along its sides, or at its rear part, and the angle of inclination of the face of the top lift to the vertical plane in which the fastening arrives or comes into the top lii't will be determined and be more or less,

according to the inclination of the plate B.

The particular jack herein shown and the parts carried by it will be found useful, and may be employed to advantage when placed upon any usual support, whether the same be horizontal or be inclined from a horizontal plane.

I claim 1. The con1bination,in a machine for inserting metallic fastenings, of a vertical shank provided with an inclined rest or support rigidly attached to its upper end, having a plane and unobstructed upper surface, and means for vertically adjusting said shank, with a jack having a foot resting loosely upon and freely movable over the surface of said rest,

substantially as described.

2. The jack and the block 9, having the heel-pin, combined with a foot or stem, as 9, having a ball-like termination and a clamp to hold the same in adjusted position, and with jaws, as 9 substantially as described.

3. The jack and the block 9, having the I heel-pin, combined with a foot or stem, as g,

having a ball-like termination and a clamp carried by the jack to hold the same in ad j usted position, and with means, substantially as described, for adjusting the said block 9 in the direction of its length, substantially as described.

4. The inclined support and segmental curb thereon, combined with the jack having a foot resting loosely upon the said inclined support and made freely movable thereover, a part of the foot being shaped to extend under the said curb, substantially as described.

5. In a jack, the inclined support and its toothed shank, combined with a pivoted sector having teeth to engage the said shank and adjust it vertically, substantially as described.

-6. The jack, combined with the pivoted arm m and a longitudinally-adjustable toe-rest thereon, and with a latch carried by said arm, and a ratchet to retain the arm in adjusted position, substantially as described.

7. The combination, with a jack, of a twopart heel-pin having beveled surfaces sliding on each other, whereby the pin, when moved one part upon the other in the direction of their length, is made to expand and fit the hole in the last, substantially as described.

8. In a jack, the two-part heel-pin having beveled faces in contact, combined with a spring to move one part of the heel-pin lon gitudinally With relation to the other, and a pin or projection, as 6, in one part of the heel-pin to cooperate with the shoulder in the other part thereof to limit the movement of the movable part of the heel-pin by the said spring, substantially as described.

9. The combination, with the socket A, of the movable support or rest, its shank provided with ratchet-teeth, and a jack to rest upon the said movable support, of dogs to engage the said ratchet-teeth to hold the rest or support in adjusted position, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

PRESCOTT H. PRATT. 

